The view from Texas SkyScreamer is amazing and alone makes the experience worth it. The chains twisting, especially on a particularly windy day, is a little nerve wracking, but I personally think it's pretty cool.
Skycoaster (Dive Bomber Alley), however, is another story. I've only ridden it three times about a year ago, and while it's not nearly as terrifying as the first time, it still gets my blood pumping every time I fly.